If you notice errors in your document in print preview, you need to correct them before you print by pressing or clicking the back button in backstage view.

[Esc].

Explanation:

If there are errors in the document and I have noticed errors at the time of print preview then I should have pressed escape key to come out of the print preview and edit the document afterwards and then print the document without errors.

So what escape key does is that it takes you out of the print preview.

So we conclude that the answer is Escape key.